Process for signalling the call number in a telecommunication network

Abstract

Telecommunication connections in a telecommunication network are directed from a telecommunication instrument (A) on the transmission side via an original node (ON) and transit nodes (TN1, . . . , TN7) to a telecommunication instrument (B) on the reception side. A number denoting the original node (ON), the A call number, the identity number of the target node and the B call number are inserted in signaling information for the telecommunication connection to be made. A test is performed in the nodes concerned in the connection on whether the A call number should be supplemented by the identity number of the node concerned. Such an addition to the A call number is done only in the original node. Thus the A call number can be simply assessed in the telecommunication instrument (B) on the reception side.

What is claimed is: 
     
       1. A process for signalling a call number in a telecommunication network, telecommunication connections being routed from telecommunication terminal equipment on a transmission side via an origin node, via transit nodes and a destination node to telecommunication terminal equipment on a reception side, there being inserted into first signalling information of the telecommunication connection to be set up a node number designating the origin node, a call number of the telecommunication terminal equipment on the transmission side, a node identity number of the destination node assigned to the telecommunication terminal equipment on the reception side and entered into the telecommunication terminal equipment on the transmission side, and a call number of the telecommunication terminal equipment on the reception side, comprising the steps of: checking in the nodes involved in a setup of the connection, on the basis of the node number of the origin node and on the basis of the node identity number of the destination node assigned to telecommunication terminal equipment on the reception side whether the call number of the telecommunication terminal equipment on the transmission side is to be supplemented by the identity number of a respective node, and   supplementing the call number of the telecommunication terminal equipment on the transmission side in the origin node by the identity number designating the origin node and not supplementing the call number of the telecommunication terminal equipment on the transmission side in the nodes following the origin node by the identity numbers designating the nodes following the origin node.   
     
     
       2. The process as claimed in claim 1, wherein after the setup of the telecommunication connection from the telecommunication terminal equipment on the transmission side to the telecommunication terminal equipment on the reception side, second signalling information is formed, which is transmitted from the telecommunication terminal equipment on the reception side to the telecommunication terminal equipment on the transmission side with the call number of the telecommunication terminal equipment on the reception side, wherein in the nodes involved in the setup of the connection it is checked on the basis of the identity number of the destination node and on the basis of the node number of the origin node whether the call number of the telecommunication terminal equipment on the reception side is to be supplemented by the identity number of the respective node, and wherein the call number of the telecommunication terminal equipment on the reception side is supplemented in the destination node, representing the second signalling information, by the identity number designating the destination node, which effectively is an origin node with respect to said second signalling information, and is not supplemented in the nodes following the destination node with respect to the second signalling information by the identity numbers designating the nodes following the destination node. 
     
     
       3. An arrangement for signalling a call number in a telecommunication network, telecommunication connections being routed from telecommunication terminal equipment on a transmission side via an origin node, via transit nodes and a destination node to telecommunication terminal equipment on a reception side, there being inserted into first signalling information of the telecommunication connection to be set up a node number designating the origin node, a call number of the telecommunication terminal equipment on the transmission side, a node identity number of the destination node assigned to the telecommunication terminal equipment on the reception side and entered into the telecommunication terminal equipment on the transmission side, and a call number of the telecommunication terminal equipment on the reception side, comprising: means for checking in the nodes involved in a setup of the connection, on the basis of the node number of the origin node and on the basis of the node identity number of the destination node assigned to the telecommunication terminal equipment on the reception side whether the call number of the telecommunication terminal equipment on the transmission side is to be supplemented by the identity number of a respective node; and   means for supplementing the call number of the telecommunication terminal equipment on the transmission side in the origin node by the identity number designating the origin node and not supplementing the call number of the telecommunication terminal equipment on the transmission side in the nodes following the origin node by the identity numbers designating the nodes following the origin node.